Rotary pump and like machine.



J. L. HANMAN. ROTARY PUMP AND LIKE MACHINE.

APPLICATION FILED JUNE 29,. L908.

Patented June 15, 1909.

2 SHEETS-SHEET l.

.EZWPVZZO 7". M

ffzzwasas.

Wm f).

Z6 zwel wrzmam J1 J. L. HANMAN.

ROTARY PUMP AND LIKE MACHINE.

APPLICATION FILED JUNE 29, 1908.

Patented June 15, 1909.

2 SHEETS-SHEET 2.

JOHN LEPINE HANMAN, OF HAMSTEAD, ENGLAND- ROTARY PUMP AND LIKE MACHINE.

Specification of Letters Patent.

Patented June 15, 1909.

Application filed June 29, 1908. Serial No. 441,009.

To all whom t't may concern:

Be it known that I, JOHN LEPINE HAN- MAN, a subject of the King of Great Britain, residing at Inglewood Lodge, Hamstead, in the county of Stafford, England, have invented new and useful Improvements in Rotary Pumps and Like Machines, of which the following is a specification.

This invention comprises improvements in rotary pumps and has for its object to increase the capacity of these machines with out complicating their construction or increasing theircost.

This invention refers to that type of malffichine in which two similar rotors are arranged in a casing each carrying projecting wing pistons which rub against the walls of the casing and also recesses for co-acting wlth such pistons during rotation.

The object of my invention is to form a pump of this type but in which the two working members are provided with adjustable rubbing and Wearing surfaces covering the whole rubbing area of the pistons, so that the capacity of the pump is very largely increased owing to the more perfect fit obtainable. I

In order that the invention may be thoroughly understood and easily carried into practical effect, I have a pended hereunto two sheets of drawings i ustrating the invention as applied to a rotary pump.

Figure 1 shows a front elevation of arotary pump constructed according to the invention. Fig. 2 is a side elevation ofvsame. Fig. 3 isa central vertical section on line w-y of Fig. 1. Fig. 4 is a sectional view showing a detachable wearing part which may be arranged on the pistons.

The casing (1, represents the two cylindrical chambers b, c, in which the rotors e, f, are arranged, each having a corresponding number of pistons g, and a similar number of notches or recesses h. The drawing shows two pistons g, and two notches h, arranged opposite to each other on each of the rotors e, f, and the two rotors are mounted onshafts i, j, at an angle of 90 degrees to. each other, thus a piston g, on one synchronizes during rotation with a recess or notch h, on the other. The shaft 1', forms the driving shaft and passes through a stufiing box It,

in one of the end plates 1, of the casing; the other end of the shaft and both ends .of the shaft 7', have ournal bearings'ni, in the end plates Z, of the casing. The shaft 11, is connected through simple spur or other suitable gear with the shaft y', so that when the former is driven through pulley n, the latter is 'also rotated at an equal speed. During such driving both rotors form working ele- -ments as well as valve elements and a,suc

tion through opening 0, is obtained in chamber b, and in chamber 0, and in 'each chamher as the next pistor. g, comes round and passes the o ening 0, a charge of water is carried round and delivered through outlet p,- while afresh suction occurs behind the piston in'the two chambers through openin o.

This known type of pum found to possess considerabl but owing to the wear of the pistons and the consequent short life of the urn it has not come into practical use. 0 o viate this wear and to provide a pump whose suction is well maintained during a protracted use, I provide the wingpistons with wearing sur faces made adjustable so that any wear or tendency to clearance between the pistons and the casing can be readily taken up and a thoroughly effective rubbing fit thus permanently obtained. In accordance with the invention I provide each iston with a wearing piece covering the w ole rubbing area of the piston. This takes the formof a T or trough piece g, adjustably mounted on the pistons g, by screw pins or bolts 1*, as shown at Fig. 4.

' -At Fig. 4, the rubbing surface consists of as set out is aT section strip housed in a recess s, runninge advantages along the piston g. The part u, of the Wearing strip 9, is slotted and the screw pins 1',

passing through the walls of the recess 8, in

In combination, a rotatableme'mber for" rotary dric al pumps or engines comprising a cylinody provided with a recessed carrying projection extending lengthwise of said name to this specification in the presence of body, a T-shaped wearing strip having one two subscribing witnesses.

of its T portions inserted in said recess, and

means for clamping the walls of said carry 5 ing member on said T inserted ortion and ad'ustably anchoring the same t erein.

n testimony whereof I have signed my JOHN LEPINE HANMAN. 

